Z92.859 — Personal history of cellular therapy, unspecified
Is Z92.859 billable?
Yes, but Z92.859 is an unspecified code. Z92.859 is a valid, billable ICD-10-CM code for encounters from October 1, 2026 through September 30, 2027. However, Z92.859 is an unspecified or catch-all code. Payers apply additional scrutiny to unspecified codes and many deny them when the medical record supports a more specific option, so check the documentation before selecting Z92.859 — the more specific alternatives are listed below.
Z92.859 at a glance
| Code | Z92.859 |
|---|---|
| Description | Personal history of cellular therapy, unspecified |
| Billable | Yes |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
What Medicare edits apply to Z92.859?
The Medicare Code Editor screens inpatient claims before they are grouped. These edits name Z92.859 directly.
CMS will reject this code as the principal diagnosis on an inpatient claim. It describes something other than the condition chiefly responsible for the admission.
Which MS-DRGs does Z92.859 group to?
Z92.859 sits in MDC 23 and helps define the logic of 1 MS-DRG (version 44, FY2027). Which one a stay actually groups to also depends on procedures and secondary diagnoses.
- 951Other Factors Influencing Health Statusmedical
How is Z92.859 listed in the Alphabetic Index?
These are the routes through the Alphabetic Index that lead to Z92.859. They show the wording a clinician may have documented, which often differs from the Tabular description.
- History › personal › cellular therapy
Excludes2 — not included here — inherited from Z92
The conditions below are not part of Z92.859, but a patient may have both at the same time. When documentation supports it, Z92.859 and the excluded code may both be reported.
- postprocedural states (Z98.-)
Excludes2 — not included here — inherited from Z92.85
The conditions below are not part of Z92.859, but a patient may have both at the same time. When documentation supports it, Z92.859 and the excluded code may both be reported.
- personal history of immune checkpoint inhibitor therapy (Z92.26)
Code also — inherited from Z77-Z99
Two codes may be needed to describe the condition fully. Whether Z92.859 is sequenced first depends on the reason for the encounter.
- any follow-up examination (Z08-Z09)
How long has Z92.859 existed?
Z92.859 first appears in FY2022.
Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.